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<p><a href="../zh/usage/fastdeploy_unit_test_guide.md">简体中文</a></p>
<h1 id="fastdeploy-unit-test-specification">FastDeploy Unit Test Specification</h1>
<ol>
<li>Test Naming Conventions</li>
<li>Test files must start with test_.</li>
<li>
<p>Test methods are recommended to follow the format test_func_behavior or test_func for clarity and readability.</p>
</li>
<li>
<p>Directory Structure</p>
</li>
<li>
<p>All unit tests should be placed under the test/ directory and organized into subdirectories following the FastDeploy module structure for easier maintenance and navigation.Reference: <a href="https://github.com/vllm-project/vllm/tree/main/tests">vllm</a></p>
</li>
<li>
<p>Coverage Scope,Each key module/class/function must be covered, including:</p>
</li>
<li>
<p>Normal Path: Standard input and main workflow.</p>
</li>
<li>Boundary Input: Empty values, extremely large/small values, and boundary conditions.</li>
<li>
<p>Abnormal Input: Invalid parameters, incorrect formats, etc. Ensure that exception handling matches expectations (e.g., check exception content).</p>
</li>
<li>
<p>Case Writing &amp; Execution</p>
</li>
<li>
<p>Test cases should support one-click execution in both CI and local environments via pytest or unittest.</p>
</li>
<li>Use explicit assert statements to validate module behavior or return values; avoid relying solely on printed outputs.</li>
<li>Each test case should maintain strong atomicity, focusing on a single behavior and avoiding mixing multiple functions in one test.</li>
<li>Tests must be independent of execution order and global state, ensuring complete decoupling between cases.</li>
<li>
<p>Custom operators must have C++-level unit tests, or forward/backward tests based on Paddle single-layer networks. Refer to Xiaoguangs documentation on custom operator development toolkit and non-official operator development specification (trial).</p>
</li>
<li>
<p>WebServer-related Tests</p>
</li>
<li>
<p>Avoid starting a WebServer directly in unit tests unless absolutely necessary for end-to-end validation.</p>
</li>
<li>Prefer using mock for network requests and module interactions to achieve more stable and controllable atomic-level testing.</li>
<li>If HTTP requests must be tested:</li>
<li>QA will provide a port injection specification (ports are written into environment variables, which test cases can directly load). This spec and scripts are expected to be ready by next Wednesday.</li>
<li>Test cases should read ports from environment variables instead of hardcoding them, ensuring reusability in CI multi-instance concurrency and easier local debugging.</li>
</ol>
<p><img width="500" height="240" alt="Image" src="https://github.com/user-attachments/assets/2b447cdf-b709-4f30-98f6-e680aef02c6f" /></p>
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